16723347457 has 16 divisors (see below), whose sum is σ = 18014275584. Its totient is φ = 15467040000.

The previous prime is 16723347413. The next prime is 16723347521. The reversal of 16723347457 is 75474332761.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16723347457 - 2¹¹ = 16723345409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16723347457.

It is not an unprimeable number, because it can be changed into a prime (16723347257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1186582 + ... + 1200592.

It is an arithmetic number, because the mean of its divisors is an integer number (1125892224).

Almost surely, 2^16723347457 is an apocalyptic number.

16723347457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16723347457 is a deficient number, since it is larger than the sum of its proper divisors (1290928127).

16723347457 is a wasteful number, since it uses less digits than its factorization.

16723347457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15240.

The product of its digits is 2963520, while the sum is 49.

The spelling of 16723347457 in words is "sixteen billion, seven hundred twenty-three million, three hundred forty-seven thousand, four hundred fifty-seven".